IP_2020_L08_Exp01_Centripetal_Force Lab 2

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American Military University *

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Mechanical Engineering

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Apr 3, 2024

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docx

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Experiment 1 Balancing Centripetal Force Experiment Inventory Materials Aluminum Tube (5) Washers 1 m Fishing Line Labware Tape Measure *Stopwatch/Timer *Scissors *Permanent Marker You must provide items marked in *red EXPERIMENT 1: BALANCING CENTRIPETAL FORCE In this experiment, you will investigate how the magnitude of radius affects the time period of an object with circular motion. PROCEDURE 1. Measure out and cut one meter of fishing line. 2. Tie a single metal washer around one end, and string the other end through the tube. Tie four washers at the other end in a group (Figure 6). 3. Measure 0.25 m from the single washer and use a permanent mark to mark this point on the line. 4. Hold the tube vertically at arm’s length to your side so that the washer near the mark is hanging from the top. 5. Hold a stopwatch in your other hand or get a willing participant to help you make time measurements. 6. Begin swinging the tube so that the top washer rotates in a circle. Increasing the speed of rotation (careful, not too fast!) should change the radius rotation. 7. Vary your speed until the mark you made on the line is at the top of the tube, making the radius Figure 6: Experiment setup of rotation 0.25 m. 8. At this speed, time how long it takes to make 15 revolutions. Record your values in Table 1. 9. Make a new mark at 0.40 m and repeat Steps 3 - 8. 10.Make a third mark at 0.15 m and repeat Steps 3 - 8 again.
©2018, eScience Labs Data Sheet Experiment 1 Data Sheet Table 1: Rotational Data Radius (m) Time per 15 Revolutions (s) Period (s) Expected Value Percent Error (%) 0.25 9 0.40 10 0.15 8 ©2018, eScience Labs Pre lab questions. 1. In this lab, you will be rotating a mass on one side of a string that is balanced by a second mass on the other end of the string (Figure 5). Apply Newton's Second Law of Motion to mass 1, m1, and mass 2, m2, to solve for the period of mass 1. a. Hint: assume m1= 4m2. How is the centripetal force on m1 related to the force of gravity on m2? 2. Draw a free body diagram and solve for the centripetal acceleration in terms of θ and g for one person riding on the amusement park ride in Figure 3. 3. The around the world yo-yo trick is completed when you twirl a yo-yo in a vertical circle. If the yo-yo was in uniform circular motion, compare the force of tension at the top of the circle to the force of tension at the bottom of the circle. a. Hint: Drawing a free body diagram will be helpful. Post Lab questions
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